Vector magnetometry exploiting phase-geometry effects in a double-resonance alignment magnetometer

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1 Citation (Scopus)

Abstract

Double-resonance optically pumped magnetometers are an attractive instrument for unshielded magnetic-field measurements due to their wide dynamic range and high sensitivity. The use of linearly polarized pump light creates alignment in the atomic sample, which evolves in the local static magnetic field, and is driven by a resonant applied field perturbation, modulating the polarization of transmitted light. We demonstrate experimentally that the amplitude and phase of observed first- and second-harmonic components in the transmitted polarization signal contain sufficient information to measure the static-magnetic-field magnitude and orientation. We describe a laboratory system for experimental measurements of these effects and verify a theoretical derivation of the observed signal. We demonstrate vector-field tracking under varying static-field orientations and show that the static-field magnitude and orientation may be observed simultaneously, with an experimentally realized resolution of 1.7 pT and 0.63 mrad in the most sensitive field orientation.

LanguageEnglish
Article number034035
Number of pages8
JournalPhysical Review Applied
Volume10
Issue number3
Early online date18 Sep 2018
DOIs
Publication statusE-pub ahead of print - 18 Sep 2018

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magnetometers
magnetic measurement
alignment
geometry
magnetic fields
polarization
dynamic range
derivation
pumps
harmonics
perturbation
sensitivity

Keywords

  • optical pumping
  • polarization of light
  • magnetometry

Cite this

@article{6f94654e94994eb1892821dd6754b731,
title = "Vector magnetometry exploiting phase-geometry effects in a double-resonance alignment magnetometer",
abstract = "Double-resonance optically pumped magnetometers are an attractive instrument for unshielded magnetic-field measurements due to their wide dynamic range and high sensitivity. The use of linearly polarized pump light creates alignment in the atomic sample, which evolves in the local static magnetic field, and is driven by a resonant applied field perturbation, modulating the polarization of transmitted light. We demonstrate experimentally that the amplitude and phase of observed first- and second-harmonic components in the transmitted polarization signal contain sufficient information to measure the static-magnetic-field magnitude and orientation. We describe a laboratory system for experimental measurements of these effects and verify a theoretical derivation of the observed signal. We demonstrate vector-field tracking under varying static-field orientations and show that the static-field magnitude and orientation may be observed simultaneously, with an experimentally realized resolution of 1.7 pT and 0.63 mrad in the most sensitive field orientation.",
keywords = "optical pumping, polarization of light, magnetometry",
author = "Ingleby, {Stuart J.} and Carolyn O'Dwyer and Griffin, {Paul F.} and Arnold, {Aidan S.} and Erling Riis",
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doi = "10.1103/PhysRevApplied.10.034035",
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TY - JOUR

T1 - Vector magnetometry exploiting phase-geometry effects in a double-resonance alignment magnetometer

AU - Ingleby, Stuart J.

AU - O'Dwyer, Carolyn

AU - Griffin, Paul F.

AU - Arnold, Aidan S.

AU - Riis, Erling

PY - 2018/9/18

Y1 - 2018/9/18

N2 - Double-resonance optically pumped magnetometers are an attractive instrument for unshielded magnetic-field measurements due to their wide dynamic range and high sensitivity. The use of linearly polarized pump light creates alignment in the atomic sample, which evolves in the local static magnetic field, and is driven by a resonant applied field perturbation, modulating the polarization of transmitted light. We demonstrate experimentally that the amplitude and phase of observed first- and second-harmonic components in the transmitted polarization signal contain sufficient information to measure the static-magnetic-field magnitude and orientation. We describe a laboratory system for experimental measurements of these effects and verify a theoretical derivation of the observed signal. We demonstrate vector-field tracking under varying static-field orientations and show that the static-field magnitude and orientation may be observed simultaneously, with an experimentally realized resolution of 1.7 pT and 0.63 mrad in the most sensitive field orientation.

AB - Double-resonance optically pumped magnetometers are an attractive instrument for unshielded magnetic-field measurements due to their wide dynamic range and high sensitivity. The use of linearly polarized pump light creates alignment in the atomic sample, which evolves in the local static magnetic field, and is driven by a resonant applied field perturbation, modulating the polarization of transmitted light. We demonstrate experimentally that the amplitude and phase of observed first- and second-harmonic components in the transmitted polarization signal contain sufficient information to measure the static-magnetic-field magnitude and orientation. We describe a laboratory system for experimental measurements of these effects and verify a theoretical derivation of the observed signal. We demonstrate vector-field tracking under varying static-field orientations and show that the static-field magnitude and orientation may be observed simultaneously, with an experimentally realized resolution of 1.7 pT and 0.63 mrad in the most sensitive field orientation.

KW - optical pumping

KW - polarization of light

KW - magnetometry

UR - http://www.scopus.com/inward/record.url?scp=85053834138&partnerID=8YFLogxK

UR - https://arxiv.org/abs/1802.09273

U2 - 10.1103/PhysRevApplied.10.034035

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